Construction on the world’s tallest building, the Kingdom Tower in Saudi Arabia, is scheduled to begin this week. The Kingdom Tower will measure 3,280 feet tall once completed and will feature a 98-foot terrace on the 157th floor. The building will measure 568 feet taller than the world’s current tallest building, the Burj Khalifa in Dubai. The tower is expected to cost $1.23 billion and take five years to construct.